https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106449
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- void foo (void) { int a[1024]; int *p, *q; #pragma omp simd collapse(2) for (p = &a[0]; p < &a[512]; p++) for (q = p + 64; q < p + 128; q++) ; } is enough to reproduce it.